61
Kenneth R Broome: Undershot impulse jet driven waterwheel having an automatically adjustable radial gate for optimal hydroelectric power generation and water level control. Michael Hetherington, March 17, 2009: US07503744 (6 worldwide citation)

A low-head impulse jet waterwheel for power generation at irrigation canal drop structures and navigation dam spillways achieves renewable electric power generation that has been lost until now due to lack of suitable equipment to convert such energy at competitive cost. Conventional practice has li ...


62
Runkle Mark Andrew, Mclaren Donald Gordon, Ardley Glenn Henry, Larsen Einar Vaugh, Weeber Konrad: Asynchronous conversion method and apparatus for use with variable speed turbine hydroelectric generation. Gen Electric, October 15, 1997: EP0800616-A1 (6 worldwide citation)

A hydroelectric power generation system (20) generates electrical power for an electrical utilization system (72). A controller (42) obtains a requested output electrical power level from a hydro-turbine unit (70) by using a signal indicative of water head (hmeas) to control speed of an asynchronous ...


63
Noguchi Tetsuya: Control system for high-efficiency operation of generating units in hydroelectric power stations.. Tokyo Shibaura Electric Co, July 3, 1991: EP0435182-A2 (6 worldwide citation)

A control system for the high-efficiency operation of two or more large-capacity generating (5, 6) units and at least one small-capacity (7) generating unit provided at a hydroelectric power station which has a necessity ot ensure the discharge of a constant amount of water taken downstream therefro ...


64
Runkle Mark Andrew: Asynchronous conversion method esp. for variable speed hydroelectric turbine.. Gen Electric, April 30, 1998: FR2755319-A1 (6 worldwide citation)

A hydroelectric power generation system (20) feeds electrical utility system (72). A controller (42) obtains signal from water head transducer (25) and requested electrical output power from hydro-turbine (70) to regulate the speed of an asynchronous rotary converter (50) coupled to the hydro-turbin ...


65
Patrick A March, Richard K Fisher Jr: Control system for enhancing fish survivability in a hydroelectric power generation installation. Hydro Resource Solutions, Foley & Lardner, March 19, 2002: US06357389 (6 worldwide citation)

A system for controlling a hydroelectric power production facility includes sensors for detecting the presence of fish adjacent to the facility. A controller linked to the sensors controls the orientation of control surfaces associated with a turbine/generator set to enhance the survivability of fis ...


66
Simon Srybnik, Louis Srybnik: Transportable hydro-electric generating system with improved water pressure enhancement feature activation systems. July 21, 2009: US07564144 (5 worldwide citation)

The invention is a transportable hydroelectric power generating system which is capable of being fully or partially assembled in a factory setting and then transported to a water stream. The system includes either a wind-driven or solar-powered pump or both features which serve to further supply pre ...


67
William Sheridan Fielder: Buoyant rotor. March 25, 2008: US07348686 (5 worldwide citation)

A buoyancy means and apparatus for reducing friction in rotational devices, particularly electric generators and or turbines. This feature is critical in hydroelectric power plants and ocean energy projects where the rotating weights are significant. Flotation devices are affixed to rotational devic ...


68
Kenneth T Millard: Fish passage apparatus with hydroelectric power generator and method. Joseph Z Ellsworth, September 6, 2011: US08011854 (5 worldwide citation)

An improved fish passage apparatus is combined with hydroelectric power generation to facilitate migration of fish between water bodies of different heights with minimal injury or trauma to fish. It may also be optimized for power generation when fish are not moving through it. The fish passage appa ...


69
Pierre Cros: Hydroelectric power station. Spie Batignolles, Young & Thompson, July 14, 1981: US04278895 (5 worldwide citation)

In a low-head hydroelectric power station, a turbine runner is mounted within the hub of a convergent-divergent draft tube at the base of a dam. At least one turbine is coupled to one or more electric generators housed within a casing which is totally submerged within the upstream pool. The distance ...


70
NORDMANN THOMAS: [fr] Agencement photovoltaïque flottant, [de] Schwimmende Photovoltaik-Anordnung, [en] Floating photovoltaic unit. TNC CONSULTING, March 23, 2011: EP2299499-A1 (5 worldwide citation)

[en] The photovoltaic arrangement (1) has a floating body designed as water noodles and/or sea snakes that are arranged parallel to each other, where the photovoltaic arrangement is connected with a hydroelectric power plant (6) for supplying photovoltaically generated electricity into an electricit ...



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